Extending Operational Limit of IPMSM in Signal-Injection Sensorless Control by Manipulation of Convergence Point

This paper analyzes the convergence of signal-injection sensorless control (SISC) especially for heavily saturated interior permanent-magnet synchronous motors (IPMSMs). In the analysis, it is revealed that the harmonic inductance and the operating current variation are critical factors in determining the operational limit of SISC. The clear boundary of SISC for an IPMSM can be obtained through the proposed convergence analysis. Based on this analysis, a control algorithm is proposed to extend the operational limit of SISC. With the proposed method, the torque capability under SISC can be maximized. Simulations and experiments are performed to verify the proposed method.

[1]  N. Bianchi,et al.  Influence of Rotor Geometry of an IPM Motor on Sensorless Control Feasibility , 2005, IEEE Transactions on Industry Applications.

[2]  Ayman M. El-Refaie,et al.  Fractional-Slot Concentrated-Windings Synchronous Permanent Magnet Machines: Opportunities and Challenges , 2010, IEEE Transactions on Industrial Electronics.

[3]  D. Stone,et al.  Improved Rotor Position Estimation by Signal Injection in Brushless AC Motors, Accounting for Cross-Coupling Magnetic Saturation , 2007, 2007 IEEE Industry Applications Annual Meeting.

[4]  Massimo Barcaro,et al.  Iron Saturation Impact on High-Frequency Sensorless Control of Synchronous Permanent-Magnet Motor , 2017, IEEE Transactions on Industry Applications.

[5]  D. Howe,et al.  Compensation for Rotor Position Estimation Error due to Cross-Coupling Magnetic Saturation in Signal Injection Based Sensorless Control of PM Brushless AC Motors , 2007, 2007 IEEE International Electric Machines & Drives Conference.

[6]  Shih-Chin Yang,et al.  Surface permanent magnet synchronous machine position estimation at low speed using eddy-current-reflected asymmetric resistance , 2012, IEEE Transactions on Power Electronics.

[7]  Seung-Ki Sul,et al.  Reduction of injection voltage in signal injection sensorless drives using capacitor-integrated inverter , 2015, 2015 IEEE Energy Conversion Congress and Exposition (ECCE).

[8]  Seung-Ki Sul,et al.  Compensation of position estimation error for precise position-sensorless control of IPMSM based on high-frequency pulsating voltage injection , 2017, 2017 IEEE Energy Conversion Congress and Exposition (ECCE).

[9]  N. Bianchi,et al.  Effect of stator and rotor saturation on sensorless rotor position detection , 2013, 2011 IEEE Energy Conversion Congress and Exposition.

[10]  Kozo Ide,et al.  High bandwidth sensorless algorithm for AC machines based on square-wave type voltage injection , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[11]  P. Garcia,et al.  Modeling and Adaptive Decoupling of High-Frequency Resistance and Temperature Effects in Carrier-Based Sensorless Control of PM Synchronous Machines , 2010, IEEE Transactions on Industry Applications.

[12]  P. Guglielmi,et al.  Cross-Saturation Effects in IPM Motors and Related Impact on Sensorless Control , 2006, IEEE Transactions on Industry Applications.

[13]  Seung-Ki Sul,et al.  Full torque-range low-speed sensorless drive for heavily saturated IPMSMs by manipulation of convergence point , 2017, 2017 IEEE Energy Conversion Congress and Exposition (ECCE).